Chairs for reinforcing rods for concrete



Aug. 26, 1958 E. K. JONES 2,848,888

CHAIRS FOR REINFORCING RODS FOR CONCRETE Filed Aug. 1a, 1955 2 Sheets-Sheet 1 Fig] Fig.3

5w K. Jones IN V EN TOR.

(Wavy 3M CHAIRS FOR REINFORCING RODS FOR CONCRETE Filed Aug. 16, 1955 E. K. JONES Aug. 26, 1958 2 Sheets-Sheet 2 9 3 3 3 .3 4 u M 7 a 3/ 2 F 9 \9 4 5 4 S m J K M E M m w m 2,848,888 Patented Aug. 26, I958 Tic ' FOR REWFORCENG RODS FOR CONRETE My invention relates to improvements in chairs for securing reinforcing steel rods in concrete forms, pits and the like while the concrete is being poured.

The primary object of my invention is to provide a chair for supporting such rods in spaced apart series with the rods in each series engaged side-by-side and each series lying in a plane at an angle to the other series.

Another object is to provide a chair for the above purposes provided with seats for supporting the reinforcing rods, and a locking rod for retaining the reinforcing rods in the seats and rotatable into locking position with a snap action.

Still another object is to provide a chair for the above purposes which will save time and labor in securing reinforcing rods in concrete forms, is adapted for attachment to one side section of such forms to securely suspend the rods in the forms preparatory to pouring of the concrete and which is inexpensive to manufacture and safe to use.

These together with other objects and advantages which will become subsequently apparent reside in the details of construction and operation as more fully hereinafter described and claimed, reference being had to the accompanying drawings forming a part hereof, wherein like numerals refer to like parts throughout, and in which:

Figure 1 is a fragmentary view partly in side elevation and partly in vertical section of the chair in a preferred embodiment thereof mounted on one section of a concrete form;

Figure 2 is an enlarged view in perspective of the chair and showing rods supported thereby in broken lines;

Figure 3 is an enlarged perspective view of the locking rod of the chair;

Figure 4 is an enlarged view in plan partly in section;

Figure 5 is an enlarged view in vertical section taken on the line 5-5 of Figure 2;

Figure 6 is a fragmentary view partly in side elevation and partly in vertical section illustrating the chair mounted on one section of a concrete form and suspended in a p Figure 7 is a fragmentary view partly in side elevation partly in vertical section illustrating a first modification of the chair;

Figure 8 is an enlarged perspective view of the chair of the first modification of the invention with the locking rod removed; and

Figure 9 is a view partly in side elevation and partly in section of a second modification of the chair.

Referring to the drawings by numerals and first to Figures 1 and 6 in the preferred embodiment thereof my improved chair comprises an oblong substantially rectangular frame 1 formed out of a rod of steel or the like bent upon itself and including a lower horizontal base section 3, upright end leg sections 5, 7 and an upper seat section 9 between the leg sections 5, 7.

The seat section 9 comprises a horizontal upwardly bowed, obtuse angled intermediate rest portion ill for reinforcing rods 13 extending between and supported by upwardly and outwardly inclined terminal portions 15, 17 between the leg sections 5, 7 and forming with said rest portion 11, a pair of V-shaped, elongated rod seats 19, 21 at opposite sides of the apex 23 of the rest portion 11 The terminal portion 15 is bent downwardly from the leg section 5 to form a downwardly opening loop 25 at one end of the frame 1 connecting the rest portion 11 to the leg section 5, whereas, the terminal portion 17 is bent downwardly from a hook 27 at the other end of the frame 1 on the lower end of a hanger stem 29 vertically aligned with the leg section 7 and having an upper end attaching eye 31. The hook 27 is welded as at 33 at its bight to the leg section 7 and forms with the terminal portion 17 a downwardly opening loop at the other end of the frame 1.

A locking rod 37 is provided for clamping the reinforcing rods 13 in the seats 19, 21. The locking rod 37 is resilient, extends through the loops 25, 35 over the reinforcing rods 13 has a right angles locking end 39 extending transversely through the hook 27 and an acute angled handle end 41 straddling the leg section 5.

The loops 25, 35, as shown in Figure 4 are twisted laterally so that the locking rod 37 can be inserted endwise therethrough and whereby the seat section 9 is offset laterally of the plane of the frame 1 so that said rod when inserted through the loops 25, 35 lies at one side of the seat section 9 and engages opposite sides of each loop 25, 35. The handle end 41 of the locking rod 37 is disposed at an angle of approximately 15 to the end 39 so that when the latter enters through the hook 2'7 in downturned position the handle end 41 hooks downwardly around the leg 5.

A particular feature of the locking rod 37 is that it is bowed between the ends 39, 41 to arch over and engage reinforcing rods arranged in the seats 19, 21 side-by-side and so that when the rod is rotated from a position in which said ends are upright it may be rotated in a direction to swing the end 39 into the hook 27 and said rod will be cammed by engagement with opposite sides of the loops 25, 35 to further rotate the same to swing the end 39 into the hook 27 and engage the end 41 with the leg 5 with a snap action whereby to lock the rod 37 in place.

Referring now to the use of the described form of the chair. As shown in Figures 1 and 4, the frame 1 may be mounted in suspended position on an outer section 43 of a concrete form above a ditch 45 by nailing the hanger stem 29 through the eye 31 as at 47, with the stem 29 and one end of the frame bearing against said section 43 to hold said frame horizontal. Either before or after mounting of the chair in the form reinforcing rods 13 are laid in the seats 19, 21 side-by-side in each seat. The locking rod 37 is then inserted over the rods 13 to clamp the rods in the seats preparatory to pouring the concrete 49.

In inserting the locking rod 37 it is first shoved by the handle end 41 through the loop 25 over and across the reinforcing rods 13 with its locking end 39 upright and its handle end 41 substantially upright and until its locking end is opposite the loop 35 and otherwise in position to be swung through the loop 35 by rotation of said rod in one direction. The locking rod 37 is then rotated in that direction to swing said end 39 through loop 35 and said rod 37 then shoved forwardly further to position the locking end opposite the book 27 after which said rod is rotated in the opposite direction to swing the locking end 29 downwardly into said hook. As the locking end 39 swings into the hook 27 the locking rod 31 because of its curvature and engagement with the loops 25, 35 is cammed so as to be rotated into locking position with snap action. In that position and as best shown in Figure 2; its acute handle end straddles and engages the leg Sand its locking end 39"incl ines downwardlyinto the hook 27.

As shown in Figure 6,. my improved chair is well adapted for suspension from aform 51 in afditch' 53'.

According to the. first modification illustratedin' Figures 7 and 8, the frame'SS' f -the chair has the base section'57 inclining downwardly from an end'leg section-59* be: neath the seat section 61 andterminating in an attaching eye 63 adapted; to be' nailed as at65to'a form-section 67. Otherwise the chair is the same as in" the preferred embodiment.

In the second' modification, the hangerstern 69 termi nates in a top hook 71 for engaging over the 'upperedge of a form section 73'5-t0' mount the chair onthe form: It is to be particularly noted: that in allforms *of-the described chairs, the seats 19, 21 provide for-supporting and the lockingrod for locking'in place reinforcing rods 13 in horizontally spaced'series with said" rods engaged side-by-side in each series and each series lying in a plane inclined; from' the' horizontal oppositely in each series relative to those in the other series. However, and equally important, thev rods 13 may be pyramided in the seats 19, 21, or'arranged in different combinations of one red. in oneiseat'with one rod'pyramidedon'two andtwo rods side-by-sidein the other seat, or mother combinations. Such and other combinations may be found necessary in foundations because of' the various footings or foundations orbeams being large enough to require splice joints. Also it is to be noted that the seats 19, 21willsupport rods of 'diiferent gage such, as onequarter or one-half inch rods either in' series side-by-side or pyramided.

The foregoing is considered as illustrative only of the principles ,of the invention. Further, since numerous modifications and changes will readily occur to those skilled in the art, it is not desired to'limit the invention to the exact construction and operation shown and described; and accordingly all suitable modifications andequivalents may be resorted to, falling within the scope of the invention as claimed;

What is claimed as new is as follows:

A chair for supporting reinforcing rods in a concrete form comprising an oblong frame including a top seat portion for supporting rods, and downwardly opening loops at the ends of said, frame andseat portion, and a locking rod extending through said loops and alongside said top seat portion, said top seat portion between said loops being upwardly bowedand' obtuse angled with a central apex portion and forming with. corresponding sides of the loops a pair of V-shaped rod rests inclining downwardly frorn'said apex.por-tion and said sides of said loops, said frame having end legs forming the other sides of the loops, said locking rod having an acute angled handle end portion hooked around one of said,

legs in straddling relation'thereto, one ofsaid loops terminating in an upwardly opening hook, said locking rod having a right angled end portion at an angle to said handle end portion and beingrotatable in said loops by said handle endportionto swing said right angled end portion into said hook and said' handle end portion into said straddling relation to said oneleg, said locking-rod en:- gaging one side of said apex portion and being longitudinally bent-for camming coactionwith said apex portion in response to rotationof the rod to swing: said right angled end portion into said hook With'a snap action.

References Cited; in the file ofthis patent UNITED STATES PATENTS 1,240,137 Hartman Sept. 11, 1917 1,263,887 Hamilton Apr. 23, 1918 1,620,501 Vogel Mar. 8, 1927 1,858,465 Schmitt May 17, 1932 

